IB/srp: Consolidate repetitive sysfs code
Remove sysfs attributes before removing a target instead of testing
the target state in every sysfs attribute callback method. Note: it is
safe to invoke a sysfs attribute removal method like
device_remove_file() twice on the same attribute.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: David Dillow <dillowda@ornl.gov>
Signed-off-by: Roland Dreier <roland@purestorage.com>
diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index 895a9ff..bcbf22e 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -474,6 +474,21 @@
}
}
+/**
+ * srp_del_scsi_host_attr() - Remove attributes defined in the host template.
+ * @shost: SCSI host whose attributes to remove from sysfs.
+ *
+ * Note: Any attributes defined in the host template and that did not exist
+ * before invocation of this function will be ignored.
+ */
+static void srp_del_scsi_host_attr(struct Scsi_Host *shost)
+{
+ struct device_attribute **attr;
+
+ for (attr = shost->hostt->shost_attrs; attr && *attr; ++attr)
+ device_remove_file(&shost->shost_dev, *attr);
+}
+
static void srp_remove_work(struct work_struct *work)
{
struct srp_target_port *target =
@@ -486,6 +501,7 @@
list_del(&target->list);
spin_unlock(&target->srp_host->target_lock);
+ srp_del_scsi_host_attr(target->scsi_host);
srp_remove_host(target->scsi_host);
scsi_remove_host(target->scsi_host);
ib_destroy_cm_id(target->cm_id);
@@ -1678,10 +1694,6 @@
{
struct srp_target_port *target = host_to_target(class_to_shost(dev));
- if (target->state == SRP_TARGET_DEAD ||
- target->state == SRP_TARGET_REMOVED)
- return -ENODEV;
-
return sprintf(buf, "0x%016llx\n",
(unsigned long long) be64_to_cpu(target->id_ext));
}
@@ -1691,10 +1703,6 @@
{
struct srp_target_port *target = host_to_target(class_to_shost(dev));
- if (target->state == SRP_TARGET_DEAD ||
- target->state == SRP_TARGET_REMOVED)
- return -ENODEV;
-
return sprintf(buf, "0x%016llx\n",
(unsigned long long) be64_to_cpu(target->ioc_guid));
}
@@ -1704,10 +1712,6 @@
{
struct srp_target_port *target = host_to_target(class_to_shost(dev));
- if (target->state == SRP_TARGET_DEAD ||
- target->state == SRP_TARGET_REMOVED)
- return -ENODEV;
-
return sprintf(buf, "0x%016llx\n",
(unsigned long long) be64_to_cpu(target->service_id));
}
@@ -1717,10 +1721,6 @@
{
struct srp_target_port *target = host_to_target(class_to_shost(dev));
- if (target->state == SRP_TARGET_DEAD ||
- target->state == SRP_TARGET_REMOVED)
- return -ENODEV;
-
return sprintf(buf, "0x%04x\n", be16_to_cpu(target->path.pkey));
}
@@ -1729,10 +1729,6 @@
{
struct srp_target_port *target = host_to_target(class_to_shost(dev));
- if (target->state == SRP_TARGET_DEAD ||
- target->state == SRP_TARGET_REMOVED)
- return -ENODEV;
-
return sprintf(buf, "%pI6\n", target->path.dgid.raw);
}
@@ -1741,10 +1737,6 @@
{
struct srp_target_port *target = host_to_target(class_to_shost(dev));
- if (target->state == SRP_TARGET_DEAD ||
- target->state == SRP_TARGET_REMOVED)
- return -ENODEV;
-
return sprintf(buf, "%pI6\n", target->orig_dgid);
}
@@ -1753,10 +1745,6 @@
{
struct srp_target_port *target = host_to_target(class_to_shost(dev));
- if (target->state == SRP_TARGET_DEAD ||
- target->state == SRP_TARGET_REMOVED)
- return -ENODEV;
-
return sprintf(buf, "%d\n", target->req_lim);
}
@@ -1765,10 +1753,6 @@
{
struct srp_target_port *target = host_to_target(class_to_shost(dev));
- if (target->state == SRP_TARGET_DEAD ||
- target->state == SRP_TARGET_REMOVED)
- return -ENODEV;
-
return sprintf(buf, "%d\n", target->zero_req_lim);
}
@@ -2432,6 +2416,7 @@
list_for_each_entry_safe(target, tmp_target,
&host->target_list, list) {
+ srp_del_scsi_host_attr(target->scsi_host);
srp_remove_host(target->scsi_host);
scsi_remove_host(target->scsi_host);
srp_disconnect_target(target);